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Date:      Fri, 2 Aug 2002 11:33:26 -0700
From:      Nicholas Esborn <nick@netdot.net>
To:        Mailing List FreeBSD Security <freebsd-security@FreeBSD.ORG>
Subject:   Re: esp tunnel without gif(4) [Was Re: vpn1/fw1 NG to ipsec/racoon troubles, help please ...]
Message-ID:  <20020802183326.GA52336@carbon.berkeley.netdot.net>
In-Reply-To: <20020802172729.GA6880@blossom.cjclark.org>
References:  <sd455602.090@aus-gwia.aus.dcnhs.org> <20020730074813.GF89241@blossom.cjclark.org> <86znw5r9h3.fsf_-_@notbsdems.nantes.kisoft-services.com> <86k7n9qv08.fsf@notbsdems.nantes.kisoft-services.com> <20020802172729.GA6880@blossom.cjclark.org>

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On Fri, Aug 02, 2002 at 10:27:29AM -0700, Crist J. Clark wrote:
> On Fri, Aug 02, 2002 at 02:56:39PM +0200, Eric Masson wrote:
<snip>
> > With only one tunnel configured, netstat -rn on the security gateway
> > doesn't show any routes to the remote networks nor host.
> > 
> > With a second tunnel added, are there any additionnal configuration
> > steps or will the kernel do the routing automagically ?
> 
> It's pretty much automagically done by way of the SPD entry. Any
> packet that matches the source and destination in the SPD gets put
> through the appropriate tunnel with the specified end points. It's not
> the same as the regular routing table and will not show up in 'netstat
> -rn.'

I ended up using AH and ESP in transport mode between gateways, then using
gif tunnels to encapsulate traffic to other networks.  I wanted to be able
to use the routing table.  I never liked tunnel mode IPsec's "magic portal"
approach.

> -- 
> Crist J. Clark                     |     cjclark@alum.mit.edu
>                                    |     cjclark@jhu.edu
> http://people.freebsd.org/~cjc/    |     cjc@freebsd.org

-nick

-- 
Nicholas Esborn
Unix Systems Administrator
Berkeley, California

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